Time to Sell These Winners

This column recommended two stocks last August that have since more than doubled. Why it's time to take profits.

Last August, investors couldn't find much to like about Sealed Air (ticker: SEE), the packaging firm best known for Bubble Wrap. The stock had fallen more than 40% since June 2011, when the company announced that it was spending $4.3 billion to acquire cleaning products supplier Diversey in a bid to diversify outside Sealed Air's core business of providing packaging products for meat.

The acquisition, which saddled the company with a heavy debt load, worried investors, who thought the acquisition went too far outside the...